JIS Silicone O-Rings

OneMonroe's JIS Silicone O-Rings are engineered to provide exceptional sealing performance in the most demanding applications. Crafted from high-quality silicone material, these O-rings are designed to withstand extreme temperatures, pressures, and chemical exposures, making them ideal for use in various industrial sectors, including automotive, aerospace, medical, and food processing. Their robust construction ensures a dependable seal that prevents leaks and protects equipment, providing long-lasting durability and reliability. With compliance to Japanese Industrial Standards (JIS), these O-rings offer precise dimensions and compatibility with a wide range of machinery and equipment, ensuring seamless integration in critical systems.

The unique properties of silicone make these O-rings an excellent choice for challenging environments. Silicone offers outstanding resistance to oxidation, UV light, and ozone, as well as flexibility across a broad temperature range. These qualities enable OneMonroe JIS Silicone O-Rings to perform reliably in both high-heat and low-temperature applications, without losing elasticity or shape. Whether you are working in freezing cold or intense heat, these O-rings maintain their integrity, providing consistent performance that helps to reduce maintenance and downtime for your equipment.

In addition to superior material quality, OneMonroe places a strong emphasis on product consistency and reliability. Each JIS Silicone O-Ring undergoes rigorous quality control to ensure it meets both JIS standards and our own stringent specifications. This attention to detail ensures that customers receive products they can trust for critical sealing applications. With our extensive range of sizes and dimensions, OneMonroe JIS Silicone O-Rings are a versatile solution that adapts to various needs, supporting efficiency, safety, and reliability in your systems. Choose OneMonroe for a high-performance, industry-compliant sealing solution you can depend on.

For more information, please see: Comparison Properties Chart, PTFE Encapsulated O-rings, Material Shelf Life, and O-ring Groove Design Chart.

Item #	IntegrationID	Type	Material	Cross Section Width	Durometer	Inside Diameter	CSW Tolerance	ID Tolerance	JIS Number
P35.5 S-70	N/A 180386	N/A JIS Standard O-Ring	N/A Silicone	N/A 0.138 in3.50 mm	N/A 70	N/A 35.20 mm1.386 in	N/A 0.004 in0.10 mm	N/A 0.006 in0.15 mm	N/A P-35.5
P355 S-70	N/A 180387	N/A JIS Standard O-Ring	N/A Silicone	N/A 0.331 in8.40 mm	N/A 70	N/A 354.50 mm13.957 in	N/A 0.006 in0.18 mm	N/A 0.039 in1.00 mm	N/A P-355
P36 S-70	N/A 180388	N/A JIS Standard O-Ring	N/A Silicone	N/A 0.138 in3.50 mm	N/A 70	N/A 35.70 mm1.406 in	N/A 0.004 in0.10 mm	N/A 0.006 in0.15 mm	N/A P-36
P360 S-70	N/A 180389	N/A JIS Standard O-Ring	N/A Silicone	N/A 0.331 in8.40 mm	N/A 70	N/A 359.50 mm14.154 in	N/A 0.006 in0.18 mm	N/A 0.039 in1.00 mm	N/A P-360
P375 S-70	N/A 180390	N/A JIS Standard O-Ring	N/A Silicone	N/A 0.331 in8.40 mm	N/A 70	N/A 374.50 mm14.744 in	N/A 0.006 in0.18 mm	N/A 0.039 in1.00 mm	N/A P-375
P38 S-70	N/A 180391	N/A JIS Standard O-Ring	N/A Silicone	N/A 0.138 in3.50 mm	N/A 70	N/A 37.70 mm1.484 in	N/A 0.004 in0.10 mm	N/A 0.006 in0.15 mm	N/A P-38
P385 S-70	N/A 180392	N/A JIS Standard O-Ring	N/A Silicone	N/A 0.331 in8.40 mm	N/A 70	N/A 384.50 mm15.138 in	N/A 0.006 in0.18 mm	N/A 0.039 in1.00 mm	N/A P-385
P39 S-70	N/A 180393	N/A JIS Standard O-Ring	N/A Silicone	N/A 0.138 in3.50 mm	N/A 70	N/A 38.70 mm1.524 in	N/A 0.004 in0.10 mm	N/A 0.006 in0.15 mm	N/A P-39
P4 S-70	N/A 180394	N/A JIS Standard O-Ring	N/A Silicone	N/A 0.075 in1.90 mm	N/A 70	N/A 3.80 mm0.150 in	N/A 0.003 in0.09 mm	N/A 0.005 in0.12 mm	N/A P-4
P40 S-70	N/A 180395	N/A JIS Standard O-Ring	N/A Silicone	N/A 0.138 in3.50 mm	N/A 70	N/A 39.70 mm1.563 in	N/A 0.004 in0.10 mm	N/A 0.006 in0.15 mm	N/A P-40
P400 S-70	N/A 180396	N/A JIS Standard O-Ring	N/A Silicone	N/A 0.331 in8.40 mm	N/A 70	N/A 399.5 mm15.728 in	N/A 0.006 in0.18 mm	N/A 0.039 in1.00 mm	N/A P-400
P41 S-70	N/A 180397	N/A JIS Standard O-Ring	N/A Silicone	N/A 0.138 in3.50 mm	N/A 70	N/A 40.70 mm1.602 in	N/A 0.004 in0.10 mm	N/A 0.01 in0.25 mm	N/A P-41
P42 S-70	N/A 180398	N/A JIS Standard O-Ring	N/A Silicone	N/A 0.138 in3.50 mm	N/A 70	N/A 41.70 mm1.642 in	N/A 0.004 in0.10 mm	N/A 0.01 in0.25 mm	N/A P-42
P44 S-70	N/A 180399	N/A JIS Standard O-Ring	N/A Silicone	N/A 0.138 in3.50 mm	N/A 70	N/A 43.70 mm1.720 in	N/A 0.004 in0.10 mm	N/A 0.01 in0.25 mm	N/A P-44
P45 S-70	N/A 180400	N/A JIS Standard O-Ring	N/A Silicone	N/A 0.138 in3.50 mm	N/A 70	N/A 44.70 mm1.760 in	N/A 0.004 in0.10 mm	N/A 0.01 in0.25 mm	N/A P-45
P46 S-70	N/A 180401	N/A JIS Standard O-Ring	N/A Silicone	N/A 0.138 in3.50 mm	N/A 70	N/A 45.70 mm1.799 in	N/A 0.004 in0.10 mm	N/A 0.01 in0.25 mm	N/A P-46
P48 S-70	N/A 180402	N/A JIS Standard O-Ring	N/A Silicone	N/A 0.138 in3.50 mm	N/A 70	N/A 47.70 mm1.878 in	N/A 0.004 in0.10 mm	N/A 0.01 in0.25 mm	N/A P-48
P48A S-70	N/A 180403	N/A JIS Standard O-Ring	N/A Silicone	N/A 0.224 in5.70 mm	N/A 70	N/A 47.60 mm1.874 in	N/A 0.006 in0.15 mm	N/A 0.01 in0.25 mm	N/A P-48A
P49 S-70	N/A 180404	N/A JIS Standard O-Ring	N/A Silicone	N/A 0.138 in3.50 mm	N/A 70	N/A 48.70 mm1.917 in	N/A 0.004 in0.10 mm	N/A 0.01 in0.25 mm	N/A P-49
P5 S-70	N/A 180405	N/A JIS Standard O-Ring	N/A Silicone	N/A 0.075 in1.90 mm	N/A 70	N/A 4.80 mm0.189 in	N/A 0.003 in0.09 mm	N/A 0.005 in0.12 mm	N/A P-5
P50 S-70	N/A 180406	N/A JIS Standard O-Ring	N/A Silicone	N/A 0.138 in3.50 mm	N/A 70	N/A 49.70 mm1.957 in	N/A 0.004 in0.10 mm	N/A 0.01 in0.25 mm	N/A P-50
P50A S-70	N/A 180407	N/A JIS Standard O-Ring	N/A Silicone	N/A 0.224 in5.70 mm	N/A 70	N/A 49.60 mm1.953 in	N/A 0.006 in0.15 mm	N/A 0.01 in0.25 mm	N/A P-50A
P52 S-70	N/A 180408	N/A JIS Standard O-Ring	N/A Silicone	N/A 0.224 in5.70 mm	N/A 70	N/A 51.60 mm2.031 in	N/A 0.006 in0.15 mm	N/A 0.01 in0.25 mm	N/A P-52
P53 S-70	N/A 180409	N/A JIS Standard O-Ring	N/A Silicone	N/A 0.224 in5.70 mm	N/A 70	N/A 52.6 mm2.071 in	N/A 0.006 in0.15 mm	N/A 0.01 in0.25 mm	N/A P-53
P55 S-70	N/A 180410	N/A JIS Standard O-Ring	N/A Silicone	N/A 0.224 in5.70 mm	N/A 70	N/A 54.60 mm2.150 in	N/A 0.006 in0.15 mm	N/A 0.01 in0.25 mm	N/A P-55

N/A
180386

N/A JIS Standard O-Ring

N/A Silicone

N/A 0.138 in3.50 mm

N/A 70

N/A 35.20 mm1.386 in

N/A 0.004 in0.10 mm

N/A 0.006 in0.15 mm

N/A P-35.5

P355 S-70

N/A
180387

N/A JIS Standard O-Ring

N/A Silicone

N/A 0.331 in8.40 mm

N/A 70

N/A 354.50 mm13.957 in

N/A 0.006 in0.18 mm

N/A 0.039 in1.00 mm

N/A P-355

P36 S-70

N/A
180388

N/A JIS Standard O-Ring

N/A Silicone

N/A 0.138 in3.50 mm

N/A 70

N/A 35.70 mm1.406 in

N/A 0.004 in0.10 mm

N/A 0.006 in0.15 mm

N/A P-36

P360 S-70

N/A
180389

N/A JIS Standard O-Ring

N/A Silicone

N/A 0.331 in8.40 mm

N/A 70

N/A 359.50 mm14.154 in

N/A 0.006 in0.18 mm

N/A 0.039 in1.00 mm

N/A P-360

P375 S-70

N/A
180390

N/A JIS Standard O-Ring

N/A Silicone

N/A 0.331 in8.40 mm

N/A 70

N/A 374.50 mm14.744 in

N/A 0.006 in0.18 mm

N/A 0.039 in1.00 mm

N/A P-375

P38 S-70

N/A
180391

N/A JIS Standard O-Ring

N/A Silicone

N/A 0.138 in3.50 mm

N/A 70

N/A 37.70 mm1.484 in

N/A 0.004 in0.10 mm

N/A 0.006 in0.15 mm

N/A P-38

P385 S-70

N/A
180392

N/A JIS Standard O-Ring

N/A Silicone

N/A 0.331 in8.40 mm

N/A 70

N/A 384.50 mm15.138 in

N/A 0.006 in0.18 mm

N/A 0.039 in1.00 mm

N/A P-385

P39 S-70

N/A
180393

N/A JIS Standard O-Ring

N/A Silicone

N/A 0.138 in3.50 mm

N/A 70

N/A 38.70 mm1.524 in

N/A 0.004 in0.10 mm

N/A 0.006 in0.15 mm

N/A P-39

P4 S-70

N/A
180394

N/A JIS Standard O-Ring

N/A Silicone

N/A 0.075 in1.90 mm

N/A 70

N/A 3.80 mm0.150 in

N/A 0.003 in0.09 mm

N/A 0.005 in0.12 mm

N/A P-4

P40 S-70

N/A
180395

N/A JIS Standard O-Ring

N/A Silicone

N/A 0.138 in3.50 mm

N/A 70

N/A 39.70 mm1.563 in

N/A 0.004 in0.10 mm

N/A 0.006 in0.15 mm

N/A P-40

P400 S-70

N/A
180396

N/A JIS Standard O-Ring

N/A Silicone

N/A 0.331 in8.40 mm

N/A 70

N/A 399.5 mm15.728 in

N/A 0.006 in0.18 mm

N/A 0.039 in1.00 mm

N/A P-400

P41 S-70

N/A
180397

N/A JIS Standard O-Ring

N/A Silicone

N/A 0.138 in3.50 mm

N/A 70

N/A 40.70 mm1.602 in

N/A 0.004 in0.10 mm

N/A 0.01 in0.25 mm

N/A P-41

P42 S-70

N/A
180398

N/A JIS Standard O-Ring

N/A Silicone

N/A 0.138 in3.50 mm

N/A 70

N/A 41.70 mm1.642 in

N/A 0.004 in0.10 mm

N/A 0.01 in0.25 mm

N/A P-42

P44 S-70

N/A
180399

N/A JIS Standard O-Ring

N/A Silicone

N/A 0.138 in3.50 mm

N/A 70

N/A 43.70 mm1.720 in

N/A 0.004 in0.10 mm

N/A 0.01 in0.25 mm

N/A P-44

P45 S-70

N/A
180400

N/A JIS Standard O-Ring

N/A Silicone

N/A 0.138 in3.50 mm

N/A 70

N/A 44.70 mm1.760 in

N/A 0.004 in0.10 mm

N/A 0.01 in0.25 mm

N/A P-45

P46 S-70

N/A
180401

N/A JIS Standard O-Ring

N/A Silicone

N/A 0.138 in3.50 mm

N/A 70

N/A 45.70 mm1.799 in

N/A 0.004 in0.10 mm

N/A 0.01 in0.25 mm

N/A P-46

P48 S-70

N/A
180402

N/A JIS Standard O-Ring

N/A Silicone

N/A 0.138 in3.50 mm

N/A 70

N/A 47.70 mm1.878 in

N/A 0.004 in0.10 mm

N/A 0.01 in0.25 mm

N/A P-48

P48A S-70

N/A
180403

N/A JIS Standard O-Ring

N/A Silicone

N/A 0.224 in5.70 mm

N/A 70

N/A 47.60 mm1.874 in

N/A 0.006 in0.15 mm

N/A 0.01 in0.25 mm

N/A P-48A

P49 S-70

N/A
180404

N/A JIS Standard O-Ring

N/A Silicone

N/A 0.138 in3.50 mm

N/A 70

N/A 48.70 mm1.917 in

N/A 0.004 in0.10 mm

N/A 0.01 in0.25 mm

N/A P-49

P5 S-70

N/A
180405

N/A JIS Standard O-Ring

N/A Silicone

N/A 0.075 in1.90 mm

N/A 70

N/A 4.80 mm0.189 in

N/A 0.003 in0.09 mm

N/A 0.005 in0.12 mm

N/A P-5

P50 S-70

N/A
180406

N/A JIS Standard O-Ring

N/A Silicone

N/A 0.138 in3.50 mm

N/A 70

N/A 49.70 mm1.957 in

N/A 0.004 in0.10 mm

N/A 0.01 in0.25 mm

N/A P-50

P50A S-70

N/A
180407

N/A JIS Standard O-Ring

N/A Silicone

N/A 0.224 in5.70 mm

N/A 70

N/A 49.60 mm1.953 in

N/A 0.006 in0.15 mm

N/A 0.01 in0.25 mm

N/A P-50A

P52 S-70

N/A
180408

N/A JIS Standard O-Ring

N/A Silicone

N/A 0.224 in5.70 mm

N/A 70

N/A 51.60 mm2.031 in

N/A 0.006 in0.15 mm

N/A 0.01 in0.25 mm

N/A P-52

P53 S-70

N/A
180409

N/A JIS Standard O-Ring

N/A Silicone

N/A 0.224 in5.70 mm

N/A 70

N/A 52.6 mm2.071 in

N/A 0.006 in0.15 mm

N/A 0.01 in0.25 mm

N/A P-53

P55 S-70

N/A
180410

N/A JIS Standard O-Ring

N/A Silicone

N/A 0.224 in5.70 mm

N/A 70

N/A 54.60 mm2.150 in

N/A 0.006 in0.15 mm

N/A 0.01 in0.25 mm

N/A P-55